Lock



June 21, 1938. L c Wm 2,121,515

LOG-K I Filed July 26, 1957 M M a BY %WA% 1.

7 1.9 v [I 1 H Patented June 21, 1938 UNITED STATES PAT sin-r GIFFIEQE 3Claims.

dated May 17, 1921, and this invention therefore consists in theconstruction, arrangement and combination of parts, substantially aswill hereinafter be more fully described and claimed.

An object therefore of the present invention is to substantiallyincorporate the features and objects of the knobless lockdisclosed in mysaid Patent No. 1,378,504, materially changed in its mechanicalstructure, however, and as greatly improved in its scope.

A further object is to provide a knobless lock embracing both main andauxiliary latch or bolt locking means, together with separate actuatingmeans cooperatably positioned, whereby the auxiliary locking means maybe employed to setlthe main locking means against actuation whenpressure is applied-to the door to which the lock-is attached for movingsaid main latch in the manner disclosed in my said Patent No. 1,378,504.

A further object is to provide the auxiliary latch with a disengageablelatch lock and release key means operatable on one side of the lock onlyso asto prevent the unauthorized opening of the locked door from theopposite side, without the necessity of fully extending the main latchby means of its-key.

. A further object is to provide an auxiliary latch which may beactuated from the side opposite that controlling the operation of theauxiliary locking means by meansv of the key for actuatingv the mainlatch.

Other objects and advantages of the invention will more fully appear asthis specification proceeds and as set forth in the appended claims.

I attain these objects by the lock disclosed in the accompanyingdrawing, in which:

Figure 1 is a face View of my improved lock with the cover plate removedshowing the auxiliary latch in locked position;

Figure 2 is a similar view showing the auxiliary latch in unlocked orretracted position, actuated by either the lock key or the latch lockset and release key, and with the main latch retracted by pressureagainst the door;

Figure 3 is a sectional view on the line 3-3 of Fig. 1;

Figure 4 is a sectional view on the line 4-4 of Fig. 1;

Figure 5 is an elevation of the key used to actuate the lock shown inFig. 1;

Figure 6 is a face View of a similar look but having an alternative typeof key hole 'andshowing the latch lockset andrelease key means, togetherwith cut-away portions of the lock cover;

Figure 7 is an elevation of the key used to actuate the lock shown inFigure 6, and

Figure 8 is a sectional view on-the line 8 -8-of Fig. 6.

In carrying out this invention,- Iemploy a mainlocking mechanismcorresponding to that shown in my present patent, and cludes a latch andlock bolt l9 carried'by a lock casing l3 in a door Ill and'cooperatingwith a slotted lock plate l2 on the door jamb' I l. The bolt is normallyheld in latching position by means of a lever spring 28. At its upperend the lever is pivoted at 22 to the casing so that its lower end isurged against a shoulder 18 of said bolt by said spring, while a detentportion 25 on said lever engages in a notch 26 of the bolt to limit theoutward movement of the bolt to latching position only. When the bolt isin latching position a roller 20 thereon extends into the slot of theplate l2 as shown in Figure 1, sufiicient to latch the door, butnormally subject to release when pressure applied to the door, thepressure causing the roller to act as a cam on the plate 12 and'to bemovedwith the bolt into the unlatched position shown in Figure 2. Whenthe bolt is thus moved which essentially in- 23 of reversed C shape anda 15- is intentionally inwardly the shoulder I8' pushes on and rocks the301 lever 23 so as to lift the 26, but upon removal of acts thru leverthe detent and detent 25 clear of notch said pressure the spring 23andsaid shoulder IE to return bolt to their latching positions.

Provision is made for moving the bolt from latching into lockingposition (as shown in dotted lines in Figure 1) and vice versa, by meansof akeysuch as shown 29, or any other suitable key which when insertedas is customary, may be turned to engage in a notch in the bolt.

A portion 24 of the lever 23 is exposed in the notch 30 so that: the.key will first engage and liftthe lever upon enteringsaid notch and thenengage one of key engaging portions formed by the'sidesof the notch andmove the boltin or out,

depending upon the movement of the key. When the bolt is movedintolocking position the detent 25 will engage in a locking position notch21 in the bolt. When the lever 23 is raised by turning the key asaforesaid the detent 25 is moved out of J said notch 21.

It is now seenthat door knobs anditheir associated latch mechanism maybe dispensed with by the use of thelock herein disclosed.

Referring further more in detail totheimprovement thereof, an auxiliarylatch is provided with a hub 2 embracing reduced end portions 3 whichserve as trunnions for pivotally supporting the latch I between the lockcasing I3 and lock cover I4, said trunnions entering apertures 4provided in the casing and cover. I I

A cam portion 5 of the latch I extends therefrom between the casing I3and an inner plate or shield 6 which is secured to said casing as byrivets l and spacers or washers 8. A pin 9 is set in the latch I nearthe extremity thereof for purposes hereinafter set forth. The shield 6is provided with an aperture 6' of sufficient size and shape so as topermit the passage therethru of the key 29.

The extremity of the latch I is shaped as an arc concentric with the hub2.

In Figure 6, a means is provided for the use of a style of a keydifferent from the key required for actuating the lock shown in Figure1, said means includes a pivoted cylinder C which is trunnioned betweenthe casing I3 and the cover I4 in a manner similar to the mounting ofthe hub 2. This type of key lock with slight mechanical variations mayreadily be adopted to comprise a lock of the cylinder key type, the typeshown being so shown as a matter of expediency merely, and not by way oflimitation of the invention.

The latch lock set and release key K has a squared shank and is adaptedfor disengageable insertion into the hub 2 for actuating the latch.

In operation, when it is desired to prevent the unauthorized opening ofthe door III, the latch I is turned to the position shown in Figure 1,so that the shoulder I8 of the bolt I9 strikes against the arc shapedextremity of the latch I which is restrained against further movement byproximity of one of the spacers 8.

The latch I may be released by actuating it counter-clock-wise by meansof the latch set and release key, or by turning the lock key clock-wiseagainst the cam 5 as best shown in Figure 2.

The key is bifurcated so that the bifurcations straddle the shield 6 asthe key is rotated, thereby determining that one of the bifurcated forksshall be restrained beneath the shield 6 so as to positively engage thecam 5 and at the same time by reason of the two forks, sufiicient widthand strength is provided for operatively engaging the portion 24 of thelever 23.

The pin 9 carried by the latch i is designed to snap into either of therecesses 9 when the latch is moved to the locked position, or to thereleased position as the case may be, and thereby prevents accidentaldisplacement of said latch, the latch being slightly resilient to permitthis snapping action of thesaid pin.

Other than as thus described, the several component parts of my improvedlock are identical with those shown and described in my patent asaforesaid.

It should now be apparent that by reason of the latch I, an auxiliarylock means is provided, and that an effective door locln'ng medium isobtained by merely moving the latch into latching position as shown inFigure 1, while the lock bolt is allowed to remain in the latchingposition also shown in said figure. In other words the door mayeffectively be locked without using the key to move the bolt intokey-locked position, although this position may be obtained if desired.

The lock may be produced in various sizes and for various purposes, forlight weight or heavy weighted doors such as screened or solid doors,for example.

For convenience, separate door pulls may be employed for drawing thedoor inwardly, if desired, none, however, are required, and no othersubstitution for the ordinary standard door knob mechanism need be made.

It is important to note that the main lock key may be used to releasethe latch I as well as the key K, and that said latch will remain inlatched position when the bolt I9 is extended out of looking position.Thus, when the bolt is retracted from looking to latching position, thelatch will prevent door pressure actuation of the bolt and it istherefore necessary to retract the latch by either method as aforesaid.

Readily produced from materials obtainable in the open market, and atslight costs, the lock readily commends itself for its ingenious foolproof features and thorough practicability.

I am aware that slight modifications may from time to time be made inthe details of structure without departing, however, from the scope ofthe present invention, and as defined in the claims which are appendedhereto. Hence, I do not limit my present invention to the exactdescription of construction herein disclosed, but what I do claim is:-

l. A look comprising a casing, a single bolt operably related to saidcasing and arranged to latch a door when in one position and to lock thedoor when in an another position, a spring urged lever pivoted to thecasing and engaging and normally maintaining said bolt in latchingposition, key engaging portions on said lever and bolt arranged to firstactuate the lever to release the bolt and then shift the bolt whensuccessively engaged with a key turned thereagainst, a latch, and meansfor moving said latch into and out of position for obstructing theunlatching movement of said bolt, and a key engaging portion on saidlatch for moving the latch out of latching position when engaged by thesaid key, and the latter is disengaged from the key engaging portions onsaid lever and bolt.

2. A look having a casing, a bolt arranged to be placed in eitherlooking or latching position, key engaging means for shifting the boltfrom one position to the other, recesses in said bolt, a lever pivotedto the casing and having a detent for engaging said recesses forretaining the bolt in its locking position and for restraining the boltfrom moving from its latching position to its locking position, a springfor retaining the lever in its normal position, and a projection on thelever for engaging the bolt when in latching position for yieldinglyholding it in such position, key engaging means on said lever for movingsame to disengage the projection from the bolt and a latch pivoted tothe casing and movable into and out of a position restraining said boltagainst releasing movement out of its latching position, a key engagingportion extending from said latch between the ends therefrom andarranged to be engaged by the key for operating said bolt and said leverupon movement of said key in a direction opposite that required tooperate said bolt and lever, and a detent projection on said latch, saidcasing having depressions adapted to be engaged by said detentprojection to releasably hold the latch in operative and inoperativepositions.

3. A look including the combination of a casing, a bolt mounted thereinfor disposition into and out of latching and locking positions, a springloaded lever pivoted in the casing and having a portion arranged toengage and move the bolt of the bolt into and out of locking position, alatch, means operable at will for moving the latch into and out ofposition preventing the movement of the bolt out of its latchingposition, a key engaging portion on the latch operating responsive toengagement therewith of the bolt and lever actuating key, for moving thelatch out of latching position, and a member on said casing disposed tobe engaged by said key engaging portion of ment of the latch in onedirection.

ISAAC C. WHITE.

said latch to limit the move- 1Q

